HJ
Helen Johnston — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cowlitz-County, Washington
Our Model Tree links this Helen Johnston across the 1930 and 1940 US Censuses in Cowlitz-County, Washington (XGBoost, ~Confirmed) — first a daughter (b.~1930), then head of a 6-person household.
Age 10
b. ~1930
Female
Daughter
Born: Washington
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cowlitz-County, Washington |
| Surname | Johnston |
| Given Name | Helen |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Washington |
| 1935 Residence (City) | Longview |
| Additional Details | |
| Highest Grade | No 3 |
| 1935 Residence | Washington |
| Birth State | Washington |
| Birth Country | United States |
| Birthplace (normalized) | washington |
| Township / Ward | Election Precinct 3 Carrolls |
| Est. Birth Year | ~1930 |
Household Members
Census records only state relationship to the household head.
Pairwise kinship is derived (~90–95% accurate), not recorded.
Step/blended families and boarders can break it.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Helen | Age | Birth yr |
|---|---|---|---|---|
| Nancy Johnston | Daughter | — | 6 | ~1934 |
| Robert Johnston | Son | — | 1 | ~1939 |
| Everett Johnston | Head | — | 35 | ~1905 |
| Ethel Johnston | Spouse | — | 29 | ~1911 |
| Mary Johnston | Daughter | — | 8 | ~1932 |
| Helen Johnston | Daughter | — | 10 | ~1930 |
Census Appearances
1930
Cowlitz, Washington
Daughter, age 1
Cowlitz, Washington · implied b. ~1929 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnston |
| Given Name | Helen May |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Washington |
| Father's Birthplace | Iowa |
| Mother's Birthplace | North Dakota |
| Occupation | none |
| Birth State | Washington |
| Birth Country | United States |
| Birthplace (normalized) | washington |
1940
Cowlitz-County, Washington
Daughter, age 10
Cowlitz-County, Washington · implied b. ~1930 — 6 household members
| Surname | Johnston |
| Given Name | Helen |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Washington |
| 1935 Residence (City) | Longview |
| Highest Grade | No 3 |
| 1935 Residence | Washington |
| Birth State | Washington |
| Birth Country | United States |
| Birthplace (normalized) | washington |
Model Tree
An inferred pedigree reconstructed from census links — up to 4 generations within the 1900–1950 window. Closer generations are built from household co-residence; deeper ones are bridged by following a relative to their own childhood census. Confidence compounds and weakens with each generation.
Our Model Tree links Helen Johnston across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Helen Johnston
Daughter · 1940 · age 10 · b. ~1930 · Washington
★ You are viewing this record
Sibling
Robert Johnston
Sibling · 1940 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Nancy Johnston
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Johnston
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Cowlitz-County, Washington
Open full size
1940 US Federal Census — Cowlitz-County, Washington
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-04336-00251)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Emma J Stevens | 40 | Wife | — | Oregon |
| 42 | John L Stevens | 33 | Head | Truck Driver | Oregon |
| 43 | Genele Stevens | 25 | Wife | — | Washington |
| 44 | Glen Stevens | 7 | Son | — | Washington |
| 45 | Mike Duchin | 39 | Head | Broke Man | Romania |
| 46 | Tressa Duchin | 35 | Wife | — | Romania |
| 47 | Marie Duchin | 15 | Daughter | — | Washington |
| 48 | Helen Duchin | 14 | Daughter | — | Washington |
| 49 | William Duchin | 12 | Son | — | Washington |
| 50 | George Duchin | 9 | Son | — | Washington |
| 51 | Albert Duchin | 7 | Son | — | Washington |
| 52 | George E Johnston | 62 | Head | Farmer | Iowa |
| 53 | Lina Johnston | 53 | Wife | — | Iowa |
| 54 | Thomas E Wheatley | 30 | Head | Donkey Puncher | Washington |
| 55 | L. Fern Wheatley | 28 | Wife | — | Iowa |
| 56 | Letha Marie Wheatley | 4 | Daughter | — | Washington |
| 57 | Everett L Johnston | 35 | Head | Carrier Loader | Iowa |
| 58 | Ethel Johnston | 29 | Wife | — | N. Dakota |
| 59 | Helen Johnston THIS PERSON | 10 | Daughter | — | Washington |
| 60 | Mary Lou Johnston | 8 | Daughter | — | Washington |
| 61 | Nancy Johnston | 6 | Daughter | — | Washington |
| 62 | Robert Johnston | 1 | Son | — | Washington |
| 63 | Arim A Wheatley | 74 | Head | — | Ohio |
| 64 | Nettie Wheatley | 72 | Wife | — | Ohio |
| 65 | Sam Wheatley | 29 | Son | Whistle Boy | Washington |
| 66 | Elmer Hutchinson | 28 | Head | Labour | Oregon |
| 67 | Beatrice Hutchinson | 27 | Wife | — | Washington |
| 68 | Lucile Hutchinson | 5 | Daughter | — | Washington |
| 69 | Caroline Hutchinson | 2 | Daughter | — | Washington |
| 70 | Dorothy Hutchinson | 0 | Daughter | — | Washington |
| 71 | Alvis Wheatley | 31 | Head | Farmer | Washington |
| 72 | Alvin Wheatley | 11 | Son | — | Washington |
| 73 | Calvin Wheatley | 9 | Son | — | Washington |
| 74 | Faye Wheatley | 8 | Daughter | — | Washington |
| 75 | Frank Hoffman | 48 | Lodger | Scaler | Oregon |
| 76 | James T Cummins | 59 | Head | Farmer | Arkansas |
| 77 | Innie Cummins | 57 | Wife | — | Georgia |
| 78 | Jessie Seeley | 33 | Head | Bucken + Faller | Iowa |
| 79 | Lorance R Seeley | 24 | Wife | — | Canada-English |
| 80 | Lonnie Grant Seeley | 4 | Daughter | — | Montana |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1940 United States Federal Census (NARA). Our Model Tree links this person across census decades using XGBoost-based record linkage, with per-link confidence scores. Household corroboration strengthens the signal when co-residents appear on the same census pages in multiple years.
Source: National Archives and Records Administration (NARA)